but I do not know what. I had the MMK and had no problems setting it up. I traded it off and wish I would have kept it. I had the chance to trade for the Anfibio so I did. Now, I can not get the Anfibio set up like the MMK. The problem is that I hunt in extremely trashy and newer parks. Not a chance for old coins and I am 69 with a bunch of bad body parts. Listening to all signals is a mind blowing experience and trying to pick out the good from the bad wears heavily on the mind in a very short time in the trashy parks I hunt. So I set my detectors up to detect the clad and pass up a lot of trash, I do understand that doing this will possibly miss some gold, but I accept that. I am super happy just to be able to get out and detect, which I have been doing since 1971. I leave the disc at the low factory settings but notch out signals lower than nickels and from just above nickels to zinkers. The MMK worked perfectly this way and did not loose depth, just as my other detector doesn't loose depth. However, the Anfibio looses a huge amount of depth if I notch. Depth only around 4" and cracks, not solid. I understand this if I was to set the disc high, but I do not. Notch just stops the detector from giving an audible signal within the segments selected and should not be loosing depth. I need some suggestions please.